Filter



Patented May 9, !899. J. F. THEURER.

FILTER.

(Applicatian filed Jan. 24, 1899.)

3 Sheets-Sheet l.

(No Model.)

IIIIII 1HE Nonms PETERS co.. moron-mo.. wAsmns'roN. u. c,

No. 624,576. Patented May '9, 1899.

' .1. F. THEURER.

FILTER.

(Application filed Jan. 24, 1899.) (No Model.) 3 Sheets-Sheet 2.

56495; ma... M

No. 624,576. Patented May 9,1899. J. F. THEURER.

FILTER.

(Applition med nn. 24, 1899.)

(No Model.)

3 Sheetsf-Slheet 3.

iu: Nnrmrs PETERS co, Pham-nwo.. wAsmNmoN, u, c.

i NrTED STATES PATENT OEEICE. 1

JACOB F. THEURER, OF MILVAUKEE, VISCONSIN.

FILTER.

sPcIFIcATIN forming part of Letters Patent No. 624,576, dated May 9, 1899.

Application tiled January 24.11899. lSerial No. 703,270. (N0 model.)

To all whom it may concern,.-

Be it known that I, JACOB F. THEURER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Visconsin, have invented certain new and useful Improvements in Filters, ot' which the following is a specification.

y present invention relatesto improvements in beer-filters, and more particularly to that type known as battery-filters.

The invention is illustrated in the accompanying drawings, wherein- Figure lis a vertical sectional'view of a portion of a filter, showing two of the elements in place relatively to each other and to the outlet or discharge opening; Fig. 2, a sectional view showing the various parts of one of the elements, the pulp excepted, in a'separated position; Fig. 3, a top plan view of one of the elements, the dierent portions or parts being shown as broken away; Fig. 4, an enlarged sectional view of the central portion of one of the elements, and Fig. 5 a perspec- 'tive view of a portion of one of the pans or supports.

The object of my invention is to produce a lilter which while efficacious in use and compact in structure is nevertheless simple in construction and readily made and assembled.

Referring to the drawings, A denotes the base of the filter-housing, provided with a central discharge-opening B. Upon the base is mounted a shell or casing O, only a portion of which is here shown, the construction of the filter-housing being the same as that shown in my Patent No.618,964, dated the 7th day of February, 1899. An inlet for the beer in the upper end of the filter is provided and the beer is free to pass down and around each of the filtering elements.

As the present invention has to deal mainly with the construction of the elements themselves, I have omitted the upper portion of the structure.

All of the elements are the same in structure, and while I have shown two in place in Fig. l and in practice find it oftentimes desirable to use a greater number, still one can be used alone successfully.

The elements are constructed as follows: I first cast a pan D, provided with a central tral opening to the rim, the ridges and valleys formed thereby growing wideras they approach the rim. (See Fig. 5.) Opening E in the center of the pan is defined by adepending flange or boss l, while at a slight distance therefrom,on the under side of the pan or dish, lthere is formed an annular ring or rib J, which is concentric with the opening. A ring K, of soft rubber, is seated in a groove formed in the pan around the depending flange I; but it will be noted that said ring does not extend acrossA to the rib J, the purpose of which will presently appear. Resting within the pan, upon the ridges thereof and the shoulder G at its outer edge, is a plate L, perforated, as shown, and preferably formed of copper. 4An openingis formed in the center of the plate and a hub M is securely riveted and soldered thereto. The upper end or `face of the hub is flat and is ot' such width as to pass in between the rim I and ring J when the elements are assembled as shown in Fig. 1. there is next placed a disk of wire-netting N, preferably sustained by or provided at its outer and inner edges with a rim O. There is next placed within the pan a mass of pulp P, which is compressed to a determinate density. The pulp shown in the drawings is supposed to have been compressed, the pulp in its uncompressed state of course occupying a greater space, and special appliances, forming no partof the present case, are employed for holding the uncompressed mass and pressing it into the pan. Upon the up- Upon the plate L per face of the pulp layer there is placed a v IDO ed face downward. When the screen is forced down into the pulp, this ring serves to discharge-openin g B, there is formed a groove or channel S, in which is placed a gasket of soft rubber, so that when the lower filtering element or pan is putin place the ring J will bear thereon and be pressed into the same when pressure is applied to the upper element, when all are assembled, to cause the parts to come to place and make all the joints tight. It will also be seen that the upper face of the rim, intermediate the opening B and the channel S, bears upon the bottom of the pan intermediate the rim I and ring J and makes, primarily, a metallic contact therewith, though the soft-rubber packing K is compressed and serves to make more certain a tight joint at this point. When the second element is placed upon the first, ring J bears directly upon the pulp in the lower pan around and adjacent to the hub thereof, and when pressure is applied to bring the parts to place said ring will be forced down into the pulp,

`thereby further condensing the same and causing it to contact closely7 with the face of the hub. At the same time the upper face or edge of the hub of the lower pan will enter between rim I and ring J, forming a tight joint with the lower face of the upper pan and the soft-rubber packing carried thereby. When the pan is in position upon the lower one, the downwardly-projecting ridges or convolutions of the pan will bear upon the Wire screen Q, thereby securely holding the pulp against swelling, While at the same time permitting the free access of beer to the upper face thereof between the ridges.

The beer will pass down through the pulp layers and in so doing will be freed from impurities, the filtered beer passing through the perforated plate L down alongthe bottom of the pan in the Valleys formed therein by the corrugations and discharge into the outletopening B. From this it will be seen that the corrugations serve a twofold purposefirst, in forming ridges or projections to hold the pulp of the element below in place, and, secondly, to vform ways or channels for the filtered beer as it passes through the pulp. Moreover, the upwardly extending ridges form a support for the lower perforated plate.

By making the pan or dish in the manner above set forth I find that the pan can be cast so smooth and true as not to need any lathework. By making the hub separate and attachingit to the plate Lin the manner above described it can be brought very readily to its proper position with relation to the central opening of the pan. Where the hub and pan are formed integral, it is often necessary to face the hub in a lathe, and in so doing the pan is liable to become sprung or twisted, rendering it unfit for use.

having a central opening and a series of corrugations radiating from said central opening toward the edge, said corrugations Widening as they approach the edge, substantially as described.

4. A pan for filtering elements provided with a central opening, a iiange I extending down from the pan around the opening; and aring or rib .I also extending down from the pan concentric with the'flange I, substantially as described.

5. A pan or holder for ltering elements provided with a central discharge-opening; a fiange I extending down from the pan about said opening; a ring .I also extending down from said pan and concentric with the fiange I; and a packing-ring K seated in a recess formed around the base ot' the flange I, subA stantially as and for the purpose described.

6. A pan or holder for filtering elements provided with a corrugated bottom and a central discharge-opening; an upstanding rim at the outer edge of said pan; and an odset or shoulder G formed around the rim, substantially as and for the purpose described.

7. A pan or holder for filtering elements having a corrugated bottom and a central discharge-outlet; an upstanding rim formed at its outer edge; and offsets or shoulders G, H, formed upon the rim, substantially as and for the purpose described.

8. A pan for filtering elements having a corrugated bottom and a central discharge# opening; a perforate plate resting upon the corrugations; and an upwardly-extending hub secured to said plate in line with the discharge-opening of the pan.

9. A filtering element comprising in combination a pan provided with a corrugated bottom and a central discharge-outlet; a perforate plate resting upon the corrugation; an upwardly-extending hub secured to said plate in line with the discharge-opening of the pan; a mass of compressed pulp resting on said plate and contacting at its edges against the edge of the pan and the upstanding hub; and means for maintaining said pulp in its proper position in said pan.

10. In a filter, the combination of a suitable base provided with a central discharge-open ing; an annular groove or channel formed around said opening and provided with a yielding packing material; a pan resting upon the base,said pan being provided with a down- IOO IIG

@4,5% l A a wardly-projecting iiange I to enter the discharge-opening; a ring J to act in conjunction with the packing material mounted in the groove or channel; a perforate plate mounted in the pan; an upstanding hub carried by said plate; a mass of filtering material mounted upon said plate within the pan; and a sec-l ond pan mounted above the lower pan, said second pan having a flange I and a ring J adapted to fit over the upper end of the hub of the lower pan, substantially as and for the purpose described.

1l. In a filter, the combination of a suitable base, a discharge-opening formed therein; a groove or channel extending around said opening; a yielding packing material mounted in said channel; and a pan for carrying the filter material resting upon said base, said pan being provided with a downwardly-projecting flange I and an annular ring J, substantially as and for the purpose described.

12. In a filter, the combination of a suitable pan or support carrying a layer of compressed pulp; and a second pan above the first pan, said second pan being provided with a rim or ring on its lower face adapted to bear against the pulp within the lower pan and condense the same, substantially as and for the purpose described.

13. In a filter, the combination of' a suitable pan or support; an upstanding hub for said pan; a layer of compressed pulp carried by the pan and abutting against the side of the tions; an upstanding hub M carried by said f plate; a disk N formed of wire-netting resting uponsaid perforate plate; a layer of compressed pulp mounted upon the disk within the pan;` a screen Q formed of relativelyr heavy woven wire mounted upon the upper face of the pulpsaid screen having a cen- I tral opening formed therein of a diameter larger than the external diameter of the hub; a flange I extending down from the pan around the central discharge-opening; and a ring J also extending down from the pan at or near the ange I and concentric therewith, substantially as described. p

In witness whereof I hereunto set my hand in the presence of two Witnesses. K

v JACOB F. THEURER. Witnesses:

FRED RUENZEL, HANS L. KOEING.. 

